Diversity-antenna system for moving vehicles

A diversity antenna system for vehicles which have a heating panel (1) which is used as an antenna, with the heating panel (1) having two heating connections (17, 23) and/or two heating connecting lines (17a, 23a) as well as two antenna connections (17′, 23′), having the following features:

• an amplifier (25) is or can be connected to the first antenna connection (17′) and is or can be electrically connected on the output side to a receiving section or radio (27),
• a diversity processor (29) is provided, which preferably evaluates an IF signal from the receiving section or radio (27),
• the first antenna connection (17′) and/or the amplifier (25) and/or the receiving section or the radio (27) are/is connected to the diversity processor (29), and
• a device for producing different terminating impedances or reactances of different magnitude is connected to the second antenna connection (23′) and is operated in particular at least indirectly via the diversity processor (29),
• characterized by the following further features:
• the diversity antenna system can be retrofitted,
• the first antenna connection (17′) is formed by the first heating connection (17), the first heating line (17a) and/or the first busbar (3) of the heating panel (1),
• the second antenna connection (23′) is formed by the second heating connection (23), the second heating connecting line (23a) and/or the second busbar (3′) of the heating panel (1),
• the device for producing different terminating impedances or reactances of different magnitude comprises a tuning box (31), and
• the tuning box (31) has one or more circuits, via which the magnitude of the terminating impedances or reactances which are formed in the tuning box can be varied continuously or in analog form.